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options.go
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options.go
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package node
import (
"fmt"
"net"
"strconv"
"time"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
kerrors "k8s.io/apimachinery/pkg/util/errors"
kubeproxyoptions "k8s.io/kubernetes/cmd/kube-proxy/app"
kubeletoptions "k8s.io/kubernetes/cmd/kubelet/app/options"
"k8s.io/kubernetes/pkg/apis/componentconfig"
kubeletcni "k8s.io/kubernetes/pkg/kubelet/network/cni"
kubelettypes "k8s.io/kubernetes/pkg/kubelet/types"
configapi "github.com/openshift/origin/pkg/cmd/server/api"
cmdutil "github.com/openshift/origin/pkg/cmd/util"
cmdflags "github.com/openshift/origin/pkg/cmd/util/flags"
"github.com/openshift/origin/pkg/cmd/util/variable"
"github.com/openshift/origin/pkg/network"
)
// Build creates the core Kubernetes component configs for a given NodeConfig, or returns
// an error
func Build(options configapi.NodeConfig) (*kubeletoptions.KubeletServer, *componentconfig.KubeProxyConfiguration, error) {
imageTemplate := variable.NewDefaultImageTemplate()
imageTemplate.Format = options.ImageConfig.Format
imageTemplate.Latest = options.ImageConfig.Latest
var path string
var fileCheckInterval int64
if options.PodManifestConfig != nil {
path = options.PodManifestConfig.Path
fileCheckInterval = options.PodManifestConfig.FileCheckIntervalSeconds
}
kubeAddressStr, kubePortStr, err := net.SplitHostPort(options.ServingInfo.BindAddress)
if err != nil {
return nil, nil, fmt.Errorf("cannot parse node address: %v", err)
}
kubePort, err := strconv.Atoi(kubePortStr)
if err != nil {
return nil, nil, fmt.Errorf("cannot parse node port: %v", err)
}
// Defaults are tested in TestKubeletDefaults
server := kubeletoptions.NewKubeletServer()
// Adjust defaults
server.RequireKubeConfig = true
server.KubeConfig.Default(options.MasterKubeConfig)
server.PodManifestPath = path
server.RootDirectory = options.VolumeDirectory
server.NodeIP = options.NodeIP
server.HostnameOverride = options.NodeName
server.AllowPrivileged = true
server.RegisterNode = true
server.Address = kubeAddressStr
server.Port = int32(kubePort)
server.ReadOnlyPort = 0 // no read only access
server.CAdvisorPort = 0 // no unsecured cadvisor access
server.HealthzPort = 0 // no unsecured healthz access
server.HealthzBindAddress = "" // no unsecured healthz access
server.ClusterDNS = []string{options.DNSIP}
server.ClusterDomain = options.DNSDomain
server.NetworkPluginName = options.NetworkConfig.NetworkPluginName
server.HostNetworkSources = []string{kubelettypes.ApiserverSource, kubelettypes.FileSource}
server.HostPIDSources = []string{kubelettypes.ApiserverSource, kubelettypes.FileSource}
server.HostIPCSources = []string{kubelettypes.ApiserverSource, kubelettypes.FileSource}
server.HTTPCheckFrequency = metav1.Duration{Duration: time.Duration(0)} // no remote HTTP pod creation access
server.FileCheckFrequency = metav1.Duration{Duration: time.Duration(fileCheckInterval) * time.Second}
server.KubeletFlags.ContainerRuntimeOptions.PodSandboxImage = imageTemplate.ExpandOrDie("pod")
server.MaxPods = 250
server.PodsPerCore = 10
server.CgroupDriver = "systemd"
server.DockerExecHandlerName = string(options.DockerConfig.ExecHandlerName)
server.RemoteRuntimeEndpoint = options.DockerConfig.DockerShimSocket
server.RemoteImageEndpoint = options.DockerConfig.DockerShimSocket
server.DockershimRootDirectory = options.DockerConfig.DockershimRootDirectory
// prevents kube from generating certs
server.TLSCertFile = options.ServingInfo.ServerCert.CertFile
server.TLSPrivateKeyFile = options.ServingInfo.ServerCert.KeyFile
containerized := cmdutil.Env("OPENSHIFT_CONTAINERIZED", "") == "true"
server.Containerized = containerized
// force the authentication and authorization
// Setup auth
authnTTL, err := time.ParseDuration(options.AuthConfig.AuthenticationCacheTTL)
if err != nil {
return nil, nil, err
}
server.Authentication = componentconfig.KubeletAuthentication{
X509: componentconfig.KubeletX509Authentication{
ClientCAFile: options.ServingInfo.ClientCA,
},
Webhook: componentconfig.KubeletWebhookAuthentication{
Enabled: true,
CacheTTL: metav1.Duration{Duration: authnTTL},
},
Anonymous: componentconfig.KubeletAnonymousAuthentication{
Enabled: true,
},
}
authzTTL, err := time.ParseDuration(options.AuthConfig.AuthorizationCacheTTL)
if err != nil {
return nil, nil, err
}
server.Authorization = componentconfig.KubeletAuthorization{
Mode: componentconfig.KubeletAuthorizationModeWebhook,
Webhook: componentconfig.KubeletWebhookAuthorization{
CacheAuthorizedTTL: metav1.Duration{Duration: authzTTL},
CacheUnauthorizedTTL: metav1.Duration{Duration: authzTTL},
},
}
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
if err := cmdflags.Resolve(options.KubeletArguments, server.AddFlags); len(err) > 0 {
return nil, nil, kerrors.NewAggregate(err)
}
proxyconfig, err := buildKubeProxyConfig(options)
if err != nil {
return nil, nil, err
}
if network.IsOpenShiftNetworkPlugin(options.NetworkConfig.NetworkPluginName) {
// SDN plugin pod setup/teardown is implemented as a CNI plugin
server.NetworkPluginName = kubeletcni.CNIPluginName
server.NetworkPluginDir = kubeletcni.DefaultNetDir
server.CNIConfDir = kubeletcni.DefaultNetDir
server.CNIBinDir = kubeletcni.DefaultCNIDir
server.HairpinMode = componentconfig.HairpinNone
}
return server, proxyconfig, nil
}
func buildKubeProxyConfig(options configapi.NodeConfig) (*componentconfig.KubeProxyConfiguration, error) {
proxyOptions, err := kubeproxyoptions.NewOptions()
if err != nil {
return nil, err
}
// get default config
proxyconfig := proxyOptions.GetConfig()
// BindAddress - Override default bind address from our config
addr := options.ServingInfo.BindAddress
host, _, err := net.SplitHostPort(addr)
if err != nil {
return nil, fmt.Errorf("The provided value to bind to must be an ip:port %q", addr)
}
ip := net.ParseIP(host)
if ip == nil {
return nil, fmt.Errorf("The provided value to bind to must be an ip:port: %q", addr)
}
proxyconfig.BindAddress = ip.String()
// HealthzPort, HealthzBindAddress - disable
proxyconfig.HealthzBindAddress = ""
proxyconfig.MetricsBindAddress = ""
// OOMScoreAdj, ResourceContainer - clear, we don't run in a container
oomScoreAdj := int32(0)
proxyconfig.OOMScoreAdj = &oomScoreAdj
proxyconfig.ResourceContainer = ""
// use the same client as the node
proxyconfig.ClientConnection.KubeConfigFile = options.MasterKubeConfig
// ProxyMode, set to iptables
proxyconfig.Mode = "iptables"
// IptablesSyncPeriod, set to our config value
syncPeriod, err := time.ParseDuration(options.IPTablesSyncPeriod)
if err != nil {
return nil, fmt.Errorf("Cannot parse the provided ip-tables sync period (%s) : %v", options.IPTablesSyncPeriod, err)
}
proxyconfig.IPTables.SyncPeriod = metav1.Duration{
Duration: syncPeriod,
}
masqueradeBit := int32(0)
proxyconfig.IPTables.MasqueradeBit = &masqueradeBit
// PortRange, use default
// HostnameOverride, use default
// ConfigSyncPeriod, use default
// MasqueradeAll, use default
// CleanupAndExit, use default
// KubeAPIQPS, use default, doesn't apply until we build a separate client
// KubeAPIBurst, use default, doesn't apply until we build a separate client
// UDPIdleTimeout, use default
// Resolve cmd flags to add any user overrides
if err := cmdflags.Resolve(options.ProxyArguments, proxyOptions.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
return proxyconfig, nil
}
func ToFlags(config *kubeletoptions.KubeletServer) []string {
return cmdflags.AsArgs(config.AddFlags, kubeletoptions.NewKubeletServer().AddFlags)
}